# Adding a non-WiFi Mitsubishi AC to Home Assistant

DevFeed: [Adding a non-WiFi Mitsubishi AC to Home Assistant](<https://devfeed.tech/articles/adding-a-non-wifi-mitsubishi-ac-to-home-assistant-61180.md>)

Original publisher: [Read original article](<https://blog.adafruit.com/2026/09/28/adding-a-non-wifi-mitsubishi-ac-to-home-assistant/>)

Author: Anne Barela

Published: 2026-09-28T20:37:59Z

Content type: tutorial

Language: en

Sources: [Adafruit Industries](<https://devfeed.tech/sources/adafruit-industries-makers-hackers-artists-designers-and-engineers.md>)

Topics: [Home Assistant](<https://devfeed.tech/topics/home-assistant.md>), [esphome](<https://devfeed.tech/topics/esphome.md>), [Raspberry Pi](<https://devfeed.tech/topics/raspberry-pi.md>)

Tags: [air-conditioner](<https://devfeed.tech/tags/air-conditioner.md>), [automation](<https://devfeed.tech/tags/automation.md>), [electronics](<https://devfeed.tech/tags/electronics.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [esphome](<https://devfeed.tech/tags/esphome.md>), [home-assistant](<https://devfeed.tech/tags/home-assistant.md>), [home-automation](<https://devfeed.tech/tags/home-automation.md>), [microcontrollers](<https://devfeed.tech/tags/microcontrollers.md>), [micropython](<https://devfeed.tech/tags/micropython.md>), [python](<https://devfeed.tech/tags/python.md>), [wifi](<https://devfeed.tech/tags/wifi.md>)

## AI overview

A project connects a Mitsubishi ducted air conditioner to Home Assistant through its CN105 service port, using an ESP32 and ESPHome instead of Mitsubishi's WiFi adapter. It enables local control of the unit's power, mode, setpoint and fan speeds, along with temperature readings. The external component also provides outdoor temperature, energy use and error codes.

## Source excerpt

A Medium post walks through putting a ducted Mitsubishi air conditioner on Home Assistant without Mitsubishi's own WiFi adapter. The unit, an SEZ-M60DA2 from around 2022, is run by a wired wall thermostat with no network connection at all. The trick is the CN105 service port on the indoor unit's control board, the same connector [...]